Cylinder locking device



Aug. 7, 1951 I D. R. CRUMB 2,563,215

- CYLINDER LOCKING DEVICE Filed Feb. 25, 1950 2 Sheets-Sheet 1 l/WfN 70H I DUANE ll. CRUMB Aug. 7,1951 D. R. CRUMB 2,553,215

CYLINDER LOCKING DEVICE Filed Feb. 25, 1950 v 2 Sheets-Sheet 2 55 1y f5. w

j nvvuwon DUANE menu/-15 Patented Aug. 7, 1951 wens: CYLINDER LOCKING- flmmflioe Crui fte 151.1154assiiuiofr t l General Motors,Corporation illetroit Mich a, v

corporation of Delaware Application February 23, 1950, Serial No. 145,870

Thi n on e a e to mpr vemen s 111 3 and mer e r l v o ha p mn nee ee a e an iv ted umb ers A o e t; of. the pr sent; nv n ion 51 pr he c n t ct o nd. arran e ent f; a p u i Qt pr n and um le s ivotedwlthint e p u t t r b ena le he. r s o-he re n ptl arra ed nasmall r plu -1 *Another object otthepmsent invention, is to provide a lock of the character described in which the parts that prevent rotation of the plug-are,

all mounted in theplugyassembly-so thata close fit between the. plug andthe casing is-elimiriated.

Another objectiof this; invention resides ,in the: provision of:- improved means; of thegchataicter e c ibed includ n a otmd, mb erssand:

pri s adapted toe. s cur v r. the outer;

ments havebeeni inserted therein to retain saidelements with the plug.

Further objects and 'advantagespf. the present invention will be apparent from the following;

de c pti n l c l. in a tq hej cco panying drawings 'wherein'i air-preferred em b;odi-

ment of the present invention is clearly shown.

In the drawings:

Fig. 1 "is an end view of the" 100k embodyingthe present-invention.

Fig. 2: is aside-- view ol -the-lock-cyiinder-hr plug embodyingthis inventionand received within a sleeve. i

Fig-r 3; is na sectionalwiew taken on line;

oi Fig.1;

4 s..e.,sst qn 1 m-teken: n ne 4+4.

Fi -.1 1 1 w mi ar t i 5 :b t w akeyin place and the plugunlocked-ior rotation.

Fig. 7; is-a sectionel view of a modified form;

oitlr e invention g v eis e e t one V ew kenel ne. -18v of Fig. '7.

Fig. 915 a view similar; to Fig. s but showing;

pp r ey: nmate.-

Fig. 10 is a view similar to Fig; 8;but showing; he o qnof ewm l r he 1.; :.wrone eys:

theparts in their locked position.

Fig. 12 15 a view similar to Fig. 11 butshQWlllK;

the partsintheir unlocked position,

Fi -.1 sa ra men ar ecti alz ewshcwm z J V t m 5.5"

-sls iiuthe ar i s a sect nal. iew of c howin amodified form of the invention and showing;

. ,.i 2 Fig leis, a. fragmentary; sectional view; showing a.Jimizhotl ofsecuring? a pin in-a slot.

'Referring toathedrawing 20 designates a casing or'sleeve of alock device which maybe of any; desired exterior contour and mayform part of a device with which thelock is used, for, ex-, amh e; a t motive: 00k et o s d q ipi ment ofllceiurniture, vending machines and the like. 'iThe casing 2Q has-a longitudinalbore2i' to; receive a rotatable-plug; 2'2 anolhas' spaced" longitudinal barriers-or grooves 23 and 24 to reei eflnds m?- preiect ns;; 5 nd-.26 e pective f f a p at -tum le 1 iniv y Su port d: with.- in: the plug 2 2. RotatiQn-oitheplug; maycontrol or; operate any. suitable; device. In; thisfinstance the plug has an extensiq hflai'soFtlfiat rotation;

f lue op esa o k n e ement.

The plug 22 hes a longitudinal.,v keywav 23; which communicates-Wilma tumbler; cavity open; ing --to, the Side of the plug; The-cavityhas transversely. disposedti mbl er receiving slots; 29' formed. by partitions ,3D:between theslots. The opposite sides of; the partitions aige preferably enlarged as at .3i to provide spring pockets 32; The: slots ec i fifll 'plfi lfiftumblersg. 2.1.: each' tumbler has I a nQl3,0h 33 located1betweeni ;the armsor projections 25, 26. All: of the tumblers are-pivotally: mounted on acpin inserted ina; rounded channel 35 extending: inwardlyifromat recess 36, see Fig. 13; formed. inc-the outer periphery'of the. plug; Similar recesses traversethe webs or-partitio'nstli: Each tumbler 'iz'lfi's urged in a counterclockwise direction,j as viewed; in Fig. 5 by an individual coil; compressionqspring. 31 located with-i-n the spring pocke'ts; 3-2:, The-cross; dimension---of th;e;spri ng s;.;are slightly; larger than the" width,ot-thetumblers; and are; guided-by the pockets 32. Obviously, the action. of the, springsyieldingly urgesl each. individual tumbler in a counterclockwise.- direction so that the. end pertime 25.will, proie ct beyond the cylindrical. sur.-.. face. 33 he-Plu and; to. looking en agement w lththe gro v rbarflerijit. ntlie asin 2 Thetuinbler lso have lugs orprojections 38that. extend into the keywav28 to be engaged by, sur faces of a key'insertedin the keywa-ywhich limitsthe movements of the tumblers; intheir counter clockwise direction as "shown' ln Fig: 6;

The =springs-3lrand -the pivot-pin 34, which forms the pivot for all the-tumblers areheldinassembled relation-within thetpliig by a retainer memberlfl; In this instance the retainer'mem her is-stormed of sheet: metalstamping comprisene ca lon at d strip 41-; which: is ..:grea:ter 111;

' groove 62 as shown in Fig. 8.

retainer 40 is secured to plug 22 by press fitting.

the same within the recess 36.

When the re-"' 'tainer is assembled to the plug the detentsi45: of;

the arms 43, 44 will engage the pin 34, to hold same within the channel 35. If desiredthe re, tainer may be secured in the recess 36 by 's'wedg" ing the material of the plug over the ends of the "'-which shows both arms 25 and 26 within the strip.

In the modification of the a through 10, the sleeve 50 is adapted to receive a"" plug 5| which has a longitudinal keyway 52 and a tumbler cavity 53 opening to the cylindrical surface of the plug 5|. The cavity has transversely disposed tumblers receiving slots 54 formed by spaced partitions 55. The slots communicate with the keyway 52 and receive plate tumblers 56 having ends 51 and 58 and a lug or projection 59. The lugs extend into the keyway 52. The rear of the slots 54 above the keyway have slits 60 each of which receive one end of a leaf spring 6| the other end is turned back upon itself to provide a rounded surface whichengages a surface on the tumbler abovethe projection 59. Each spring-acts to urge its respective tumbler ina counterclockwise direction so that the arm 51 will normally project into the barrier or It is to be understood that a one-piece spring member could be used instead of individual spring members. spring member could be used.' When a comb like member is used the untoothed portion would fit into the slits 60 and the resilient teeth or arms would engage the surfaces on the tumblers-above the projections 59. 4

All of the tumblers are pivotally mounted on'a pin 63 inserted in a rounded bottom 64 of a chan-' nel 55 which traverses the partitions. In this instance the channel is formed with shoulders 66' beyond the rounded bottom upon which rests a metal strip 61 inserted therein. The strip '61 operates to hold the pin 63 in the rounded portion of the recess. The plate is secured within the channel, by swedging the material of the plug over the strip as shown in Fig. 14.

In the modification shown in Figs; 11 and 12 the bore ofsleeve 10 is adapted to receive a plug 1| which has a keyway 12 and a tumbler cavity 13 opening to one side of the plug. The cavity 13 has transversely disposed tumbler receiving slots 14 formed by partitions, not shown, between the slots. These slots communicate with the keyway and receive tumblers 15 having arms16 and 11 and a lug or projection 18 which extend into the keyway. In this instance each projection is formed with a post 18a over which one end of a compression spring 19 fits and rests on the lug 18. The plug is provided with a series of radial bores 80 above the keyway which are equal in number. to the slots. A recess 8| in the outer 0 surface of the plug 1| traverses the bores and: provides shoulders upon which a strip of metal 62" rests. Before the metal strip 82 is secured, a: coil "compression spring 19 is inserted in each bor'e'then the strip 82 is nested in the recess 8| and held in place by staking over a portion of the plug 1|.

All of the tumblers are pivotally mounted on a pin 83 resting in the rounded portion of a recess 84 provided in the side of the plug which extends across all the partitions, and is secured in the ame manner as pin 53 shown in Fig. 14.

' When a serrated key is inserted in the keyway thus engaging the lower surfaces of the lugs or projections and if the code of the key and the "code tumblers are the same the tumblers will be "rotated about the pin against the action of its urging springs in a clockwise direction to retract thefends normally in the groove 23 into the convfinesjof the plug. For example from the position shown in Fig. 5 to that position shown in Fig. 6

confines of the plug 22. When this occurs the plug is free to rotate ineither direction of rotation. If the key code does not agree with the tumbler code'then one of the arms 25 will either not be rotated" enough to be out of the barrier 23 or one of the arms of the tumblers will be rotated too much so that the other arm 26 will project into the barrier 24 and will in both cases prevent rotation of the'plug thus resisting the use of any unauthorized key.

While the embodiment of the present invention as herein disclosed, constitutes preferred For example, a comb-like rotatably mounted within the cylinder, said plug having a series of tumbler transverse slots therein and having a longitudinal keyway in communication with the slots; tumblers pivotally mounted in the slots, said tumblers having spaced endsfor movement into and out of engagement with the barriers to lock and retain the plug; spring means supported within the plug and acting on the tumblers so that one arm of each tumbler will be located within its respective slot while the other arm will engage one of the barriers when the plug is in its normal position, said other arm will engage the other barrier in event of their being moved out of the slot; lugs on the tumblers extending into the keyway and engageable by surfaces of the key inserted in the keyway and so located that the proper key moves all of the arms out of engagement from both barriers. i

2. In a key operated lock, the combination of "a cylinder provided with spaced longitudinal grooves in its inner surface; a plug rotatably mounted within the cylinder, said plug having a series of transverse slots intermediate its ends and having a longitudinal keyway extending from its front end and to the rear of said slots, said keyway communicating with said slots; a series of flat plate tumblers located in the slots, each tumbler having two spaced arms; a common pivot for all the tumblers; individual spring means supported'within the plug acting on said tumblers so that one arm of each tumbler will extend into one of the grooves when the plug is 'in its" normal position andthe other arm will extend into the other groove and prevent rotation of the plug in the event of their being moved beyond the external surface'o'f the'plug; a lug on' a'ch tumbler extending into the keyway, the lugs of each tumbler being inc} diiferent-plane and adapted to engage surfaces of keys inserted into the keyway and so located that a proper key causes a partial rotation of the tumblers and in positions that all arms are out of the grooves of the cylinder thereby permitting rotation of the plug.

3. In a lock of the character described, the combination of a plug having a plurality of transverse slots and having a longitudinal recess in its periphery; tumblers located in the slots; 10

a common pivot rod for all the tumblers located within the recess; individual coil compression springs for the tumblers; a retainer member secured within the recess, said member having a portion extending across all of the slots against which the other ends of the springs abut to hold the springs under compression and said member also having arms engaging parts of the rod to hold the rod within the recess.

DUANE ROGER CRUMB.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,226,257 Ritzert May 15, 1917 1,376,256 Conte Apr. 26, 1921 1,883,326 Thor Oct. 18, 1932 2,182,588 Jacobi Dec. 5, 1939 FOREIGN PATENTS Number Country Date 551,876 France Jan. 15, 1923 

